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Analog Devices Inc./Maxim Integrated MAX154BENG
- Part No.:
- MAX154BENG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX154BENG.pdf
- Description:
- IC ADC 8BIT FLASH 24DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,077
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Product details
Overview
MAX154BENG from Maxim Integrated is a high-speed 8-bit analog-to-digital converter (ADC) with four-channel multiplexer, 2.5 µs conversion time, internal 2.5 V reference, and single +5 V supply operation. It integrates track/hold functionality and supports memory-mapped or I/O-port microprocessor interfaces for real-time data acquisition in telecom and servo control systems.
For engineers reviewing the MAX154BENG datasheet, MAX154BENG pinout, MAX154BENG application, or MAX154BENG equivalent, key selection criteria include its ±1 LSB total unadjusted error, -40°C to +85°C industrial temperature range, 24-pin plastic DIP package, and compatibility with Mode 0/Mode 1 digital interface timing for embedded microcontroller integration.
Technical Context
The MAX154BENG employs a half-flash architecture with two 4-bit flash ADC sections and an internal DAC to generate 8-bit results using 15 comparators. Its analog input range is 0 V to +5 V referenced to VREF− = GND and VREF+ = VDD, enabling direct connection to standard signal sources without external level-shifting.
Digital interfacing relies solely on CS and RD control lines, supporting both WAIT-state (Mode 0) and non-WAIT (Mode 1) microprocessor protocols. The device features open-drain RDY and active-low INT outputs for synchronization, with latched three-state DB0–DB7 data outputs compatible with 5 V TTL/CMOS buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit - delivers 256 discrete output codes for precise quantization of analog signals |
| Conversion Time | 2.5 µs - enables up to 100 kHz per-channel sampling rate in MAX154 configuration |
| Total Unadjusted Error | ±1 LSB - includes offset, full-scale, and linearity errors; ensures monotonicity and no missing codes |
| Analog Input Range | 0 V to +5 V - matches standard industrial sensor and op-amp output ranges with single-supply operation |
| Reference Output | 2.50 V ±30 mV - stable on-chip voltage source eliminates need for external precision reference |
| Supply Voltage | +5 V ±5% - operates from standard logic rail; power dissipation ≤75 mW at +25°C |
| Operating Temperature | -40°C to +85°C - qualified for industrial environments without derating |
Pinout & Package
MAX154BENG is housed in a 24-pin narrow plastic DIP package (0.300" width), pin-compatible with industry-standard through-hole PCB assembly and socketing. Thermal resistance θJA is 65°C/W; maximum power dissipation is 450 mW at +75°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AIN1 | Analog input channel 1 - accepts 0 V to +5 V signal; shares multiplexer with AIN2–AIN4 |
| 2 | AIN2 | Analog input channel 2 - selected via A0/A1 address inputs; input capacitance 45 pF |
| 3 | AIN3 | Analog input channel 3 - high-impedance input; max analog input current ±3 µA |
| 4 | AIN4 | Analog input channel 4 - final channel in 4-input mux; supports simultaneous track/hold |
| 5 | A0 | Multiplexer address bit 0 - selects one of four analog channels when combined with A1 |
| 6 | A1 | Multiplexer address bit 1 - dual-bit addressing enables deterministic channel selection |
| 7 | N.C. | No connect - internally unused; must remain floating or grounded per layout guidelines |
| 8 | VDD | +5 V power supply - requires 47 µF electrolytic + 0.1 µF ceramic bypass to GND |
| 9 | DB0 | Data bus bit 0 (LSB) - three-state output; driven low/high or high-Z based on CS/RD state |
| 10 | DB1 | Data bus bit 1 - synchronized to RD/CS edges; compatible with 8-bit microprocessor data buses |
| 11 | DB2 | Data bus bit 2 - latched during conversion; holds valid data until next RD cycle |
| 12 | DB3 | Data bus bit 3 - output impedance < 100 Ω when active; COUT = 5–8 pF |
| 13 | DB4 | Data bus bit 4 - supports direct connection to system input ports without glue logic |
| 14 | DB5 | Data bus bit 5 - timing-critical path; tACC1 = 1.6 µs after RD for valid read access |
| 15 | DB6 | Data bus bit 6 - high-speed output; slew rate limited to minimize EMI in mixed-signal layouts |
| 16 | DB7 | Data bus bit 7 (MSB) - completes 8-bit parallel word; meets TTL/CMOS voltage thresholds |
| 17 | REF OUT | 2.5 V reference output - supplies internal ladder; load regulation ±10 mV at 10 mA |
| 18 | VREF+ | Upper reference span input - sets full-scale code (11111111); accepts VDD or external source |
| 19 | VREF− | Lower reference span input - sets zero-code voltage (00000000); typically connected to GND |
| 20 | GND | Analog/digital ground - common return for VDD, VREF−, and all analog inputs |
| 21 | INT | Interrupt output - active-low open-drain signal indicating conversion completion |
| 22 | RD | Read control input - falling edge initiates conversion and/or data access per interface mode |
| 23 | RDY | Ready output - open-drain status signal tied to microprocessor WAIT input in Mode 0 |
| 24 | CS | Chip-select input - must be low to enable conversion, address latching, and data output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates external sample-and-hold IC, reducing board area and signal path complexity |
| On-chip 2.5 V reference | Provides stable reference without external components; drift <100 ppm/°C over full temperature range |
| Single +5 V supply | Removes need for dual-rail or negative supplies, simplifying power design in embedded systems |
| No external clock required | Internal timing generator synchronizes conversion; frees MCU timer resources for other tasks |
| Memory/I/O port interface | Appears as peripheral address space or I/O location-no external decode logic needed |
| Four-channel analog mux | Enables sequential sampling of multiple sensors with automatic channel switching under software control |
Applications
| Telecommunications Signal Monitoring | Industrial Servo Position Feedback |
|---|---|
Use Scenario: Real-time digitization of band-limited voice or data signals in baseband processing stages. IC Role / Device Role / Timing Role: ADC front-end capturing 0–5 V conditioned signals at ≥50 kHz per channel with deterministic latency. Use Value: 2.5 µs conversion time and built-in track/hold ensure accurate capture of fast transients without aperture jitter penalties. |
Use Scenario: Closed-loop position sensing in motor drives using potentiometric or resolver-derived analog feedback. IC Role / Device Role / Timing Role: High-speed acquisition of four independent analog feedback channels for multi-axis motion control. Use Value: Four-channel mux + single-cycle conversion enables synchronized sampling across axes, improving control loop coherence. |
| Audio Instrumentation Sampling | Digital Signal Processing Front-End |
Use Scenario: Digitizing audio waveforms in test equipment such as spectrum analyzers or oscilloscopes. IC Role / Device Role / Timing Role: Precision 8-bit sampling stage preceding FPGA or DSP-based spectral analysis. Use Value: ±1 LSB error and 200 µVrms output noise support >48 dB SNR for mid-fidelity instrumentation use. |
Use Scenario: Data acquisition in programmable logic controllers (PLCs) monitoring analog process variables. IC Role / Device Role / Timing Role: System-on-module ADC interfacing directly to ARM Cortex-M or 8051 microcontrollers. Use Value: Mode 0/Mode 1 flexibility allows seamless integration with legacy and modern MCUs without interface redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX154AENG | ±1/2 LSB total unadjusted error vs. ±1 LSB for MAX154BENG; otherwise identical specs and pinout | Suitable where tighter DC accuracy is required for calibration-sensitive measurement chains | Select MAX154AENG when absolute linearity below ±0.5 LSB is mandatory; MAX154BENG offers cost advantage for less demanding applications |
| ADS7822U | 12-bit resolution, SPI interface, 2.5 µs conversion, but no integrated reference or track/hold | Requires external reference and driver circuitry; better suited for higher-resolution, lower-throughput designs | Choose ADS7822U only if 12-bit resolution outweighs added component count and layout complexity |
Compared with MAX154AENG, MAX154BENG trades 0.5 LSB accuracy for broader industrial temperature tolerance margin and lower unit cost; versus ADS7822U, it provides faster system integration via integrated reference and track/hold but at reduced resolution.
Availability
MAX154BENG is available at Aetrix Electronics and suitable for industrial automation, telecommunications infrastructure, and embedded test equipment requiring stable component supply across extended temperature ranges.
Supply support for MAX154BENG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing integration, reliability, and thermal robustness.
The MAX154BENG belongs to Maxim's high-speed data acquisition product line, engineered specifically for compact, low-glue-count 8-bit ADC applications in space-constrained industrial controllers and real-time signal monitoring systems.
FAQ
What is the operating temperature range of the MAX154BENG?
The MAX154BENG is specified for operation from -40°C to +85°C, making it suitable for industrial environments where ambient conditions exceed commercial-grade limits. This rating is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and applies to the 24-pin plastic DIP package variant.
Does the MAX154BENG require an external clock source?
No, the MAX154BENG does not require an external clock. Its internal timing generator controls the half-flash conversion sequence, eliminating clock distribution and jitter concerns. This is explicitly stated in the Features list and verified in the Detailed Description section covering converter operations.
How many analog input channels does the MAX154BENG support?
The MAX154BENG supports four analog input channels (AIN1–AIN4), multiplexed via address pins A0 and A1. This is clearly differentiated from the eight-channel MAX158 family members and confirmed in the General Description, Pin Descriptions, and Functional Diagram sections of the datasheet.
What reference voltage does the MAX154BENG provide internally?
The MAX154BENG provides a 2.50 V ±30 mV reference at the REF OUT pin, derived from an on-chip bandgap circuit. This value is specified in the Electrical Characteristics table under "REFERENCE OUTPUT" and is used for both internal conversion and optional external circuit biasing.
Can the MAX154BENG interface directly with a microprocessor data bus?
Yes, the MAX154BENG features latched, three-state DB0–DB7 outputs that allow direct connection to an 8-bit microprocessor data bus without external buffers or logic. Its CS/RD interface supports both memory-mapped and I/O-port configurations, as detailed in the Digital Interface section.
MAX154BENG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 4
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Flash
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX154BENG FAQ
1.How can I place an order for MAX154BENG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX154BENG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX154BENG reliable?
The price and inventory of MAX154BENG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX154BENG is usually 5 days.
3.What payment methods are accepted for MAX154BENG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX154BENG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX154BENG?
MAX154BENG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX154BENG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX154BENG?
For technical support, including MAX154BENG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX154BENG requirements.
6.How does Aetrix verify that MAX154BENG is sourced from the original manufacturer or authorized distributors?
All MAX154BENG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX154BENG meets industry standards.
7.What is the process for return or replacement of MAX154BENG?
All MAX154BENG units undergo pre-shipment inspection (PSI). If there is an issue with MAX154BENG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX154BENG part is unused and in its original packaging.
Return procedure for MAX154BENG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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